A 0.18-g sample of a purified protein is dissolved in water to give 2.0 mL of solution. The osmotic pressure is found to be 18.5 torr at 25°C. Calculate the protein's molar mass.

Chemistry: Principles and Practice
3rd Edition
ISBN:9780534420123
Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Publisher:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Chapter12: Solutions
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Problem 12.79QE
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A 0.18-g sample of a purified protein is dissolved in water to give 2.0 mL of solution. The osmotic pressure is found to be 18.5 torr at 25°C. Calculate the protein's molar mass.

Expert Solution
Step 1

To calculate the protein's molar mass, we can use the following equation:

π = CRT

where Π is the osmotic pressure, C is the molarity of the protein solution, R is the gas constant (0.0821 L·atm/mol·K), and T is the temperature in Kelvin.

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